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/*-
* ============LICENSE_START=======================================================
* ONAP : DCAE
* ================================================================================
* Copyright 2018-2019 TechMahindra
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.universalvesadapter.service;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.onap.universalvesadapter.adapter.UniversalEventAdapter;
import org.onap.universalvesadapter.dmaap.Creator;
import org.onap.universalvesadapter.dmaap.MRPublisher.DMaaPMRPublisher;
import org.onap.universalvesadapter.dmaap.MRSubcriber.DMaaPMRSubscriber;
import org.onap.universalvesadapter.exception.DMaapException;
import org.onap.universalvesadapter.exception.MapperConfigException;
import org.onap.universalvesadapter.exception.VesException;
import org.onap.universalvesadapter.utils.CollectorConfigPropertyRetrival;
import org.onap.universalvesadapter.utils.DmaapConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
/**
* Service that starts the universal ves adapter module to listen for events
*
* @author kmalbari
*
*/
/**
* @author PM00501616
*
*/
/**
* @author PM00501616
*
*/
@Component
public class VesService {
private static final Logger metricsLogger = LoggerFactory.getLogger("metricsLogger");
private static final Logger debugLogger = LoggerFactory.getLogger("debugLogger");
private static final Logger errorLogger = LoggerFactory.getLogger("errorLogger");
private boolean isRunning = true;
@Value("${defaultConfigFilelocation}")
private String defaultConfigFilelocation;
@Autowired
private Creator creator;
@Autowired
private UniversalEventAdapter eventAdapter;
@Autowired
private DmaapConfig dmaapConfig;
@Autowired
private CollectorConfigPropertyRetrival collectorConfigPropertyRetrival;
private static List<String> list = new LinkedList<String>();
/**
* method triggers universal VES adapter module.
*/
public void start() throws MapperConfigException {
debugLogger.info("Creating Subcriber and Publisher with creator.............");
String topicName = null;
String publisherTopic = null;
// Hashmap of subscriber and publisher details in correspondence to the respective
// collectors in kv file
Map<String, String> dmaapTopics = collectorConfigPropertyRetrival.getDmaapTopics(
"stream_subscriber", "stream_publisher", defaultConfigFilelocation);
ExecutorService executorService = Executors.newFixedThreadPool(dmaapTopics.size());
for (Map.Entry<String, String> entry : dmaapTopics.entrySet()) {
String threadName = entry.getKey();
// subcriber and corresponding publisher topics in a Map
Map<String, String> subpubTopics = collectorConfigPropertyRetrival
.getTopics(entry.getKey(), entry.getValue(),
defaultConfigFilelocation);
for (Map.Entry<String, String> entry2 : subpubTopics.entrySet()) {
topicName = entry2.getKey();
publisherTopic = entry2.getValue();
}
// Publisher and subcriber as per each collector
DMaaPMRSubscriber subcriber = creator.getDMaaPMRSubscriber(topicName);
DMaaPMRPublisher publisher = creator.getDMaaPMRPublisher(publisherTopic);
debugLogger.info("Created scriber topic:" + topicName + "publisher topic:"
+ publisherTopic);
executorService.submit(new Runnable() {
@Override
public void run() {
Thread.currentThread().setName(threadName);
metricsLogger.info(
"fetch and publish from and to Dmaap started:"
+ Thread.currentThread()
.getName());
int pollingInternalInt = dmaapConfig.getPollingInterval();
debugLogger.info(
"The Polling Interval in Milli Second is :{}"
+ pollingInternalInt);
debugLogger.info(
"starting subscriber & publisher thread:{}",
Thread.currentThread().getName());
while (true) {
synchronized (this) {
for (String incomingJsonString : subcriber
.fetchMessages()
.getFetchedMessages()) {
list.add(incomingJsonString);
}
if (list.isEmpty()) {
try {
Thread.sleep(pollingInternalInt);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
debugLogger.debug(
"number of messages to be converted :{}",
list.size());
if (!list.isEmpty()) {
String val = ((LinkedList<String>) list)
.removeFirst();
List<String> messages =
new ArrayList<>();
String vesEvent =
processReceivedJson(
val);
if (vesEvent != null && (!(vesEvent
.isEmpty()
|| vesEvent.equals(
"")))) {
messages.add(vesEvent);
publisher.publish(messages);
metricsLogger.info(
"Message successfully published to DMaaP Topic-\n"
+ vesEvent);
}
}
}
}
}
});
}
}
/**
* method stops universal ves adapter module
*/
public void stop() {
isRunning = false;
}
/**
* method for processing the incoming json to ves
*
* @param incomingJsonString
* @return ves
*/
private String processReceivedJson(String incomingJsonString) {
String outgoingJsonString = null;
if (!"".equals(incomingJsonString)) {
try {
outgoingJsonString = eventAdapter.transform(incomingJsonString);
} catch (VesException exception) {
errorLogger.error(
"Received exception : {},{}"
+ exception.getMessage(),
exception);
debugLogger.warn(
"APPLICATION WILL BE SHUTDOWN UNTIL ABOVE ISSUE IS RESOLVED.");
} catch (DMaapException e) {
errorLogger.error("Received exception : {}", e.getMessage());
}
}
return outgoingJsonString;
}
}
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